A238139 - cp's OEIS frontend

A238139 a(n) is the smallest prime divisor (not yet in the sequence) of all composite numbers of the form m^2+1 between the primes A002496(n) and A002496(n+1), or 0 if there is no such prime.

n	a(n)
1	0
2	2
3	13
4	5
5	17
6	113
7	29
8	53
9	313
10	37
11	137
12	41
13	89
14	241
15	61
16	97
17	233
18	101
19	73
20	193
21	557
22	229
23	601
24	157
25	8581
26	109
27	337
28	293
29	4993
30	181
31	14621
32	433
33	197
34	149
35	21013
36	509
37	277
38	281
39	521
40	11329
41	257
42	173
43	1321
44	6917
45	373
46	389
47	3037
48	821
49	7109
50	353
51	773
52	397
53	457

[0, 2, 13, 5, 17, 113, 29, 53, 313, 37, 137, 41, 89, 241, 61, 97, 233, 101, 73, 193, 557, 229, 601, 157, 8581, 109, 337, 293, 4993, 181, 14621, 433, 197, 149, 21013, 509, 277, 281, 521, 11329, 257, 173, 1321, 6917, 373, 389, 3037, 821, 7109, 353, 773, 397, 457]

cp's OEIS Frontend

A238139 a(n) is the smallest prime divisor (not yet in the sequence) of all composite numbers of the form m^2+1 between the primes A002496(n) and A002496(n+1), or 0 if there is no such prime.

Table of values

List of values